I put a skunk2 IM on my friends 2001 lude and I was impressed with the performance but not with the lack of instructions and the fact that we had to modify a few things. Plus we never got the CEL light issue resolved. I called skunk2 a dozen times and never recieved a reply. I will never buy a skunk2 product. The skunk2 is not a bolt-on an go affair (at least not for the 5th gen lude anyway). The one paragraph instructions that came with the Skunk2 IM are very vague and the lack of tech support makes things even worse unless you are a professional installer with fabrication experience. I would go edlebrock.